Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 98 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is kept the same. (a) True (b) False
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is kept the same. (a) True (b) False
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) yeast (b) string (c) a balloon (d) a battery cell
4. 4.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
5. 5.⚙️ Which of these is a wheel and axle? (a) a slide (b) a ramp (c) a doorknob (d) a sloping road
6. 6.⚙️ Which simple machine is a doorknob? (a) a wheel and axle (b) a pulley (c) a lever (d) an inclined plane
7. 7.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) about half (b) zero (c) the same (d) double
8. 8.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a mirror (c) coins as the load (d) a pencil
9. 9.True or false: a mirror is not needed for the thread-reel pulley. (a) True (b) False
10. 10.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) sideways (b) up (c) down (d) in a circle
11. 11.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
12. 12.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) the same cup of coins (c) the same string (d) number of pulleys
13. 13.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
14. 14.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is the one thing we change. (a) True (b) False
15. 15.⚙️ Which simple machine is a crane? (a) an inclined plane (b) a lever (c) a pulley (d) a wheel and axle
16. 16.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) string (d) a magnet
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is what we measure. (a) True (b) False
18. 18.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it turns blue (c) it gets wet (d) it gets longer
19. 19.True or false: an empty thread reel is needed for the thread-reel pulley. (a) False (b) True
20. 20.🧺 Do we need a pencil for the thread-reel pulley? (a) not needed (b) needed
21. 21.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is the one thing we change. (a) False (b) True
22. 22.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: how hard we must pull is the one thing we change. (a) True (b) False
23. 23.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 20 cm (c) 5 cm (d) 10 cm
24. 24.True or false: a pencil is not needed for the thread-reel pulley. (a) True (b) False
25. 25.🧺 Which of these is not needed for the thread-reel pulley? (a) an empty thread reel (b) a pencil (c) string (d) a balloon
26. 26.🏗️ What does a single fixed pulley mainly do? (a) adds weight (b) makes it magnetic (c) changes pull direction (d) halves the weight
27. 27.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) a pencil (c) a balloon (d) a small paper cup
28. 28.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) number of pulleys (b) the same string (c) how hard we must pull
29. 29.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
30. 30.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a battery cell (d) a small paper cup
31. 31.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the lifting height is kept the same. (a) False (b) True
32. 32.True or false: turmeric powder is needed for the thread-reel pulley. (a) False (b) True
33. 33.🧺 Do we need a magnet for the thread-reel pulley? (a) needed (b) not needed
34. 34.⚙️ Which of these is a wheel and axle? (a) a crowbar (b) a steering wheel (c) a ramp (d) a crane
35. 35.True or false: a balloon is needed for the thread-reel pulley. (a) False (b) True
36. 36.🧺 Which of these is not needed for the thread-reel pulley? (a) a pencil (b) a small paper cup (c) an empty thread reel (d) yeast
37. 37.⚙️ Which simple machine is a sloping road? (a) a wheel and axle (b) a lever (c) an inclined plane (d) a pulley
38. 38.True or false: a well pulley is a wheel and axle. (a) True (b) False
39. 39.🧺 Do we need yeast for the thread-reel pulley? (a) needed (b) not needed
40. 40.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) number of pulleys (c) how hard we must pull

Free science experiments lessons, practice and worksheets at talentjr.in/science-experiments-for-kids